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Accrued Liabilities
 6 Months Ended
Jun. 30, 2017
Payables and Accruals [Abstract]  
Accrued Liabilities
Accrued Liabilities:

The following table presents the detail of accrued liabilities as of the dates presented:

 
December 31,
 
June 30,
 
2016
 
2017
Accrued compensation and benefits
$
16,659

 
$
21,427

Legal fees and settlements
2,795

 
2,381

Miscellaneous accrued liabilities
2,799

 
6,440

Total accrued liabilities:
$
22,253

 
$
30,248